Introduction The assessment of energy cost in paediatric populations has typically occurred in laboratory settings, which usually obtain higher validity coefficients. However, laboratory based protocols may be limited in the assessment of free-living behaviours as creating environments that reflect such behaviours is difficult [1]. Few studies have provided children the option ...
Introduction Children have intermittent activity patterns and this must be considered when assessing activity with accelerometers. This study examines the impact of accelerometer epoch duration on the recorded time spent in physical activity during recess. A second goal was to determine whether variability in activity is associated with overall time ...
Introduction The use of motion sensors to objectively measure physical activity (PA) in young children has become increasingly common, due to the various advantages they have over other methods, such as parental report [1]. New and improved motion sensors are continuously being made available, leaving researchers with many methodological [1] and budgetary ...
Introduction Different types of accelerometers are available to assess physical activity (PA) patterns levels, and the choice about which to use depends on various factors: cost, physical characteristics (weight, size, and battery life), performance (number of axes, possible epochs, system of data transfer, recording duration, function of the epochs, and ...
Introduction The MTI and GT1M (Actigraph,LLC, Florida) uniaxial accelerometers have been used interchangeably in field research, however their internal technologies are different. The GT1M detects acceleration via a polysilicon surface micromachined sensor while the MTI utilises a cantilevered beam sensor. Determining the reliability across accelerometers and the ...
Introduction The Incidental and Planned Activity Questionnaire (IPAQ), renamed to be IPEQ, is a self-report short questionnaire that was developed for use in ageing research. The questionnaire asks about an average week frequency and duration (closed categories) of planned exercise, walking for exercise, walking to places and chores inside and ...
Introduction With increasing interest in how the physical environment may influence physical activity, methods are needed that can be used to investigate the environmental context of activity. The aim of this study is to use combined accelerometer and GPS data to describe the level and location of children’s physical ...
Introduction Children’s physical activity has traditionally been measured with self-reports. Self-reports are easily administered, low-cost measurements. However, they do not capture the sporadic short-burst nature of children’s physical activity very well. Accelerometers have therefore, in recent times, become the method of choice in physical activity research. These devices ...
Introduction Epidemiological studies for investigating physical activity as a predictor for a health outcome such as obesity often use average daily moderate to vigorous physical activity (MVPA) as a summary of the highly dimensional actigraph measurements. The problem with using a single summary statistics such as MVPA is that it ...
Introduction Much of the research about sitting measurement has focused on total sitting time [1] (Rosenberg et al) and leisure-time sedentary behaviours [2] (Clark et al 2009), with less attention given to other domains in which sitting and sedentary behaviours occur. This study aimed to assess the measurement properties of a measure of ...